Order : NUDIBRANCHIA
Infraorder : DORIDACEA
Superfamily : DORIDOIDEA
Family : Discodorididae
Usually coloured with a distinctive colour pattern in the illustrations alongside, but sometimes it is a uniform yellow-brown without the colour pattern. It can grow very large, at least to 25 cm long. For some reason early naturalists found this animal rather repulsive, giving it a number of names likening it to unattractive body organs (the liver and brain) or descriptive terms denoting its unattractiveness. Kelaart (1858), when describing it from Ceylon as Doris exanthemata stated:
“The whole animal gives one more the idea of a horrid disease than the charms of sea nymph”. Other synonyms are Doris cerebralis Gould, 1852; Doris foetida Pease, 1860 and Doris hepatica Abraham, 1877.